StringParser详解

static char* string1 = "RTSP 200 OK\r\nContent-Type: MeowMix\r\n\t \n3450"; StrPtrLen theString(string1, strlen(string1)); StringParser victim(&theString); StrPtrLen rtsp; SInt32 theInt = victim.ConsumeInteger(); if (theInt != 0) return false; victim.ConsumeWord(&rtsp); if ((rtsp.Len != 4) && (strncmp(rtsp.Ptr, "RTSP", 4) != 0)) return false; victim.ConsumeWhitespace(); theInt = victim.ConsumeInteger(); if (theInt != 200) return false; return true; /* * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ * */ /* File: StringParser.h Contains: A couple of handy utilities for parsing a stream. */ #ifndef __STRINGPARSER_H__ #define __STRINGPARSER_H__ #include "StrPtrLen.h" #include "MyAssert.h" #define STRINGPARSERTESTING 0 class StringParser { public: StringParser(StrPtrLen *inStream) : fStartGet(inStream == NULL ? NULL : inStream->Ptr), fEndGet(inStream == NULL ? NULL : inStream->Ptr + inStream->Len), fCurLineNumber(1), fStream(inStream) {} ~StringParser() {} // Built-in masks for common stop conditions static UInt8 sDigitMask[]; // stop when you hit a digit static UInt8 sWordMask[]; // stop when you hit a word static UInt8 sEOLMask[]; // stop when you hit an eol static UInt8 sEOLWhitespaceMask[]; // stop when you hit an EOL or whitespace static UInt8 sWhitespaceMask[]; // skip over whitespace //GetBuffer: //Returns a pointer to the string object StrPtrLen* GetStream() { return fStream; } //判断当前字符是否是stopChar，如果是，则向后跳过一个字符 Bool16 Expect(char stopChar); //如果当前字符是\r (alone), \n (alone), \r\n，跳过 Bool16 ExpectEOL(); //Returns the next word void ConsumeWord(StrPtrLen* outString = NULL) { ConsumeUntil(outString, sNonWordMask); } //判断当前字符是否是inStopChar，如果不是则向后跳过一个字符，直到等于inStopChar为止， //截取跳过的这段字符赋值给outString(不为空时)。 void ConsumeUntil(StrPtrLen* outString, char inStopChar); //截取当前位置的整数保存到outString，函数返回整数值 //跳过当前字符开始的数字保存到outString（判断当前字符是否是数字，是则判断下一个字符，直到不是为止, //将其保存到outString）函数返回该数字 UInt32 ConsumeInteger(StrPtrLen* outString = NULL); //取当前位置的float保存到outString，函数返回float Float32 ConsumeFloat(); Float32 ConsumeNPT(); //Keeps on going until non-whitespace void ConsumeWhitespace() { ConsumeUntil(NULL, sWhitespaceMask); } //Assumes 'stop' is a 255-char array of booleans. Set this array //to a mask of what the stop characters are. true means stop character. //You may also pass in one of the many prepackaged masks defined above. void ConsumeUntil(StrPtrLen* spl, UInt8 *stop); //+ rt 8.19.99 //returns whatever is avaliable until non-whitespace void ConsumeUntilWhitespace(StrPtrLen* spl = NULL) { ConsumeUntil( spl, sEOLWhitespaceMask); } void ConsumeUntilDigit(StrPtrLen* spl = NULL) { ConsumeUntil( spl, sDigitMask); } void ConsumeLength(StrPtrLen* spl, SInt32 numBytes); void ConsumeEOL(StrPtrLen* outString); //GetThru: //Works very similar to ConsumeUntil except that it moves past the stop token, //and if it can't find the stop token it returns false inline Bool16 GetThru(StrPtrLen* spl, char stop); inline Bool16 GetThruEOL(StrPtrLen* spl); inline Bool16 ParserIsEmpty(StrPtrLen* outString); //Returns the current character, doesn't move past it. inline char PeekFast() { if (fStartGet) return *fStartGet; else return '\0'; } char operator[](int i) { Assert((fStartGet+i) < fEndGet);return fStartGet[i]; } //Returns some info about the stream UInt32 GetDataParsedLen() { Assert(fStartGet >= fStream->Ptr); return (UInt32)(fStartGet - fStream->Ptr); } UInt32 GetDataReceivedLen() { Assert(fEndGet >= fStream->Ptr); return (UInt32)(fEndGet - fStream->Ptr); } UInt32 GetDataRemaining() { Assert(fEndGet >= fStartGet); return (UInt32)(fEndGet - fStartGet); } char* GetCurrentPosition() { return fStartGet; } int GetCurrentLineNumber() { return fCurLineNumber; } // A utility for extracting quotes from the start and end of a parsed // string. (Warning: Do not call this method if you allocated your own // pointer for the Ptr field of the StrPtrLen class.) - [sfu] // // Not sure why this utility is here and not in the StrPtrLen class - [jm] static void UnQuote(StrPtrLen* outString); #if STRINGPARSERTESTING static Bool16 Test(); #endif private: //向前移动一个字符 void AdvanceMark(); //built in masks for some common stop conditions static UInt8 sNonWordMask[]; char* fStartGet; char* fEndGet; int fCurLineNumber; StrPtrLen* fStream; }; Bool16 StringParser::GetThru(StrPtrLen* outString, char inStopChar) { ConsumeUntil(outString, inStopChar); return Expect(inStopChar); } Bool16 StringParser::GetThruEOL(StrPtrLen* outString) { ConsumeUntil(outString, sEOLMask); return ExpectEOL(); } Bool16 StringParser::ParserIsEmpty(StrPtrLen* outString) { if (NULL == fStartGet || NULL == fEndGet) { if (NULL != outString) { outString->Ptr = NULL; outString->Len = 0; } return true; } Assert(fStartGet <= fEndGet); return false; // parser ok to parse } #endif // __STRINGPARSER_H__

/* * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ * */ /* File: StringParser.cpp Contains: Implementation of StringParser class. */ #include "StringParser.h" UInt8 StringParser::sNonWordMask[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //0-9 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //10-19 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //20-29 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //30-39 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, //40-49 - is a word 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //50-59 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, //60-69 //stop on every character except a letter 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, //90-99 _ is a word 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, //120-129 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //130-139 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //140-149 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //150-159 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //160-169 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //170-179 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //180-189 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //190-199 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //200-209 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //210-219 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //220-229 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //230-239 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //240-249 1, 1, 1, 1, 1, 1 //250-255 }; UInt8 StringParser::sWordMask[] = { // Inverse of the above 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //0-9 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //10-19 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //30-39 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, //40-49 - is a word 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //50-59 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, //60-69 //stop on every character except a letter 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //70-79 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //80-89 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, //90-99 _ is a word 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //100-109 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //110-119 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, //120-129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249 0, 0, 0, 0, 0, 0 //250-255 }; UInt8 StringParser::sDigitMask[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //0-9 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //10-19 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //30-39 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, //40-49 //stop on every character except a number 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, //50-59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //60-69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //90-99 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //120-129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249 0, 0, 0, 0, 0, 0 //250-255 }; UInt8 StringParser::sEOLMask[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //0-9 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, //10-19 //'\r' & '\n' are stop conditions 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //30-39 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //40-49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //50-59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //60-69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //90-99 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //120-129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249 0, 0, 0, 0, 0, 0 //250-255 }; UInt8 StringParser::sWhitespaceMask[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, //0-9 // stop on '\t' 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, //10-19 // '\r', \v', '\f' & '\n' 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //20-29 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, //30-39 // ' ' 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //40-49 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //50-59 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //60-69 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //70-79 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //80-89 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //90-99 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //100-109 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //110-119 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //120-129 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //130-139 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //140-149 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //150-159 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //160-169 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //170-179 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //180-189 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //190-199 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //200-209 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //210-219 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //220-229 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //230-239 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, //240-249 1, 1, 1, 1, 1, 1 //250-255 }; UInt8 StringParser::sEOLWhitespaceMask[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, //0-9 // \t is a stop 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, //10-19 //'\r' & '\n' are stop conditions 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, //30-39 ' ' is a stop 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //40-49 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //50-59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //60-69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //90-99 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //120-129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249 0, 0, 0, 0, 0, 0 //250-255 }; void StringParser::ConsumeUntil(StrPtrLen* outString, char inStop) { if (this->ParserIsEmpty(outString)) return; char *originalStartGet = fStartGet; while ((fStartGet < fEndGet) && (*fStartGet != inStop)) AdvanceMark(); if (outString != NULL) { outString->Ptr = originalStartGet; outString->Len = fStartGet - originalStartGet; } } void StringParser::ConsumeUntil(StrPtrLen* outString, UInt8 *inMask) { if (this->ParserIsEmpty(outString)) return; char *originalStartGet = fStartGet; while ((fStartGet < fEndGet) && (!inMask[(unsigned char) (*fStartGet)])) AdvanceMark(); if (outString != NULL) { outString->Ptr = originalStartGet; outString->Len = fStartGet - originalStartGet; } } void StringParser::ConsumeLength(StrPtrLen* spl, SInt32 inLength) { if (this->ParserIsEmpty(spl)) return; //sanity check to make sure we aren't being told to run off the end of the //buffer if ((fEndGet - fStartGet) < inLength) inLength = fEndGet - fStartGet; if (spl != NULL) { spl->Ptr = fStartGet; spl->Len = inLength; } if (inLength > 0) { for (short i=0; i<inLength; i++) AdvanceMark(); } else fStartGet += inLength; // ***may mess up line number if we back up too much } UInt32 StringParser::ConsumeInteger(StrPtrLen* outString) { if (this->ParserIsEmpty(outString)) return 0; UInt32 theValue = 0; char *originalStartGet = fStartGet; while ((fStartGet < fEndGet) && (*fStartGet >= '0') && (*fStartGet <= '9')) { theValue = (theValue * 10) + (*fStartGet - '0'); AdvanceMark(); } if (outString != NULL) { outString->Ptr = originalStartGet; outString->Len = fStartGet - originalStartGet; } return theValue; } Float32 StringParser::ConsumeFloat() { if (this->ParserIsEmpty(NULL)) return 0.0; Float32 theFloat = 0; while ((fStartGet < fEndGet) && (*fStartGet >= '0') && (*fStartGet <= '9')) { theFloat = (theFloat * 10) + (*fStartGet - '0'); AdvanceMark(); } if ((fStartGet < fEndGet) && (*fStartGet == '.')) AdvanceMark(); Float32 multiplier = (Float32) .1; while ((fStartGet < fEndGet) && (*fStartGet >= '0') && (*fStartGet <= '9')) { theFloat += (multiplier * (*fStartGet - '0')); multiplier *= (Float32).1; AdvanceMark(); } return theFloat; } Float32 StringParser::ConsumeNPT() { if (this->ParserIsEmpty(NULL)) return 0.0; Float32 valArray[4] = {0, 0, 0, 0}; Float32 divArray[4] = {1, 1, 1, 1}; UInt32 valType = 0; // 0 == npt-sec, 1 == npt-hhmmss UInt32 index; for (index = 0; index < 4; index ++) { while ((fStartGet < fEndGet) && (*fStartGet >= '0') && (*fStartGet <= '9')) { valArray[index] = (valArray[index] * 10) + (*fStartGet - '0'); divArray[index] *= 10; AdvanceMark(); } if (fStartGet >= fEndGet || valType == 0 && index >= 1) break; if (*fStartGet == '.' && valType == 0 && index == 0) ; else if (*fStartGet == ':' && index < 2) valType = 1; else if (*fStartGet == '.' && index == 2) ; else break; AdvanceMark(); } if (valType == 0) return valArray[0] + (valArray[1] / divArray[1]); else return (valArray[0] * 3600) + (valArray[1] * 60) + valArray[2] + (valArray[3] / divArray[3]); } Bool16 StringParser::Expect(char stopChar) { if (this->ParserIsEmpty(NULL)) return false; if (fStartGet >= fEndGet) return false; if(*fStartGet != stopChar) return false; else { AdvanceMark(); return true; } } Bool16 StringParser::ExpectEOL() { if (this->ParserIsEmpty(NULL)) return false; //This function processes all legal forms of HTTP / RTSP eols. //They are: \r (alone), \n (alone), \r\n Bool16 retVal = false; if ((fStartGet < fEndGet) && ((*fStartGet == '\r') || (*fStartGet == '\n'))) { retVal = true; AdvanceMark(); //check for a \r\n, which is the most common EOL sequence. if ((fStartGet < fEndGet) && ((*(fStartGet - 1) == '\r') && (*fStartGet == '\n'))) AdvanceMark(); } return retVal; } void StringParser::ConsumeEOL(StrPtrLen* outString) { if (this->ParserIsEmpty(outString)) return; //This function processes all legal forms of HTTP / RTSP eols. //They are: \r (alone), \n (alone), \r\n char *originalStartGet = fStartGet; if ((fStartGet < fEndGet) && ((*fStartGet == '\r') || (*fStartGet == '\n'))) { AdvanceMark(); //check for a \r\n, which is the most common EOL sequence. if ((fStartGet < fEndGet) && ((*(fStartGet - 1) == '\r') && (*fStartGet == '\n'))) AdvanceMark(); } if (outString != NULL) { outString->Ptr = originalStartGet; outString->Len = fStartGet - originalStartGet; } } void StringParser::UnQuote(StrPtrLen* outString) { // If a string is contained within double or single quotes // then UnQuote() will remove them. - [sfu] // sanity check if (outString->Ptr == NULL || outString->Len < 2) return; // remove begining quote if it's there. if (outString->Ptr[0] == '"' || outString->Ptr[0] == '\'') { outString->Ptr++; outString->Len--; } // remove ending quote if it's there. if ( outString->Ptr[outString->Len-1] == '"' || outString->Ptr[outString->Len-1] == '\'' ) { outString->Len--; } } void StringParser::AdvanceMark() { if (this->ParserIsEmpty(NULL)) return; if ((*fStartGet == '\n') || ((*fStartGet == '\r') && (fStartGet[1] != '\n'))) { // we are progressing beyond a line boundary (don't count \r\n twice) fCurLineNumber++; } fStartGet++; } #if STRINGPARSERTESTING Bool16 StringParser::Test() { static char* string1 = "RTSP 200 OK\r\nContent-Type: MeowMix\r\n\t \n3450"; StrPtrLen theString(string1, strlen(string1)); StringParser victim(&theString); StrPtrLen rtsp; SInt32 theInt = victim.ConsumeInteger(); if (theInt != 0) return false; victim.ConsumeWord(&rtsp); if ((rtsp.len != 4) && (strncmp(rtsp.Ptr, "RTSP", 4) != 0)) return false; victim.ConsumeWhiteSpace(); theInt = victim.ConsumeInteger(); if (theInt != 200) return false; return true; } #endif